Fungalpedia – Note 668, Mitopeltis
Mitopeltis Speg.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Microthyriaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Colonies epiphytic on leaves, appearing as black dots. Superficial hyphae abundant, brown, guttulate, septate, reticulate, thick-walled. Sexual morph: Thyriothecia superficial, circular, flattened, black, with a central ostiole, opening by stellate dehiscence. Upper wall comprising of radially and parallelly arranged brown cells. Hamathecium lacking pseudoparaphyses. Asci 8-spored, bitunicate, clavate, short pedicellate. Ascospores 2-seriate, hyaline, slightly curved, cylindrical to clavate, 3-septate, slightly constricted at the septum, smooth-walled. Asexual morph: Undetermined (Spegazzini 1921a, b; Zeng et al. 2019).
Notes: Spegazzini (1921a, b) introduced Mitopeltis with a single species M. chilensis. The holotype specimen was re-examined by Zeng et al. (2019). Mitopeltis is characterized by having superficial, ostiolate, circular thyriothecia with stellate dehiscence, clavate 8-spored asci with 3-septate, hyaline, cylindrical ascospores. Zeng et al. (2019) transferred this genus to Microthyriales based on the ostiolate, orbicular thyriothecia with an upper wall comprising radially arranged cells. However, Mitopeltis differs from Microthyrium by its brown, guttulate, septate, reticulate, thick-walled superficial hyphae, clavate asci with cylindrical to clavate and 3-septate ascospores.
Type species: Mitopeltis chilensis Speg., Boln Acad. nac. Cienc. Co´rdoba 25: 93 (1921).
Other accepted species: Species Fungorum – search Mitopeltis.
References
Spegazzini C 1921b – Mycetes chilenses. Boletín de la Academia Nacional de Ciencias en Córdoba 25:1–124.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023